runs like [@#$%&*!] down low?


3 replies to this topic
  • Shane_Bettin

Posted November 05, 2004 - 05:05 PM

#1

well i took my bike for a rip today after sealing the airbox. the only problem i had was when the throttle was at a steady 1/4 or so opening the engine would sputter and feal like its gonna stall. does the pilot affect this part of the throttle range? i put a 45 pilot in it before because it was lean from my leak, but now that fixed so could that 45 be giving it to much fuel at that opening?
thanks
shane

  • NAFLASH

Posted November 05, 2004 - 05:34 PM

#2

What kind bike are you riding?How many turns is the pilot screw out?How big is the main jet?Elevation?

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  • Shane_Bettin

Posted November 06, 2004 - 03:27 AM

#3

its a 99 yz400f. 182 main, 4th or 5th clip (can't remember), 45 pilot, 1 3/4 turns out. around 0 degrees celcius, between 300 and 1300 feet above sea level.

  • sirthumpalot

Posted November 06, 2004 - 04:18 AM

#4

Before you do any tuning, clean out the carb really good. Make sure it's clean.

You're right in the throttle range where the pilot jet and fuel screw can make a large difference, that is where I would start adjusting. Try to tune it out with the fuel screw, and if that isn't enough adjustment then start swapping pilot jets.





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